aemeijers wrote:
Stormin Mormon wrote:
Lay blade on flat surface....

That doesn't tell you if the hole for the mounting bolt is perpendicular
to the flat surface.

Put bolt through hole, lay blade on bolt head on flat surface.

--
"On this Memorial Day, as our nation honors its unbroken line of fallen heroes
- and I see many of them in the audience here today - our sense of patriotism
is particularly strong." -- Barack Obama's seance